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The horizontal fraction bar was introduced by the Arabs.
There are 20 feet of blood vessels in each square inch of human skin.
The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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